Piston packing-ring.



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F. VAN DER CRUYSSEN.

PISTON PACKING RiNG. a

APPLICATION FILED MAY 2e,,-1913.

1,089,026, Patented Mar. 3, 1914.

FRANK VAN DEB, CRUYSSEN, OI WEBSTER GROVES, MISSOURI.

PISTON PAGK ING-RING.

Specification of Letters Patent.

Patented Mar. 3,1914.

Application filed May 26, 1913. Serial No. 769,931.

To all whom it may concern:

Be it known that I, FRANK VAN DER CRUYSSEN, a citizen of the United States residing at Webster Groves, Missouri, have invented a certain new and useful Improvement in Piston Packing-Rings, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to piston packing rings, and particularly to piston rings of the type that are used in internal combustion engines.

One object of my invention is to provide a leak-proof piston ring that can be manufactured at a low cost and which is so designed that one ring will pack the piston of an internal combustion engine as effectively as three or four rings of the type now generally used, thereby effecting a great saving in the manufacture of internal combustion engines and also reducing the number of parts of same.

Another object is 'to'provide a piston ring which is so designed that the parts of same cannot separate and thus permit the operating medium in the cylinder to leak around the ring in case the groove in the piston that receives the ring is wide enough to permit thering to move longitudinally of the piston. And still another (.bject is to provide a ring that can be applied and removed easily and which is so designed that it will remain leak-proof even after the parts of same have worn excessively.

Other objects and desirable features of my invention will be hereinafter pointed out.

. Figure 1 is a vertical sectional view of the cylinder of an internal combustion engine showing the piston in elevation and equipped with a packing ring constructed in accordance with my invention; Fig. 2 is a perspective View of said packing rin Fig. 3 is a perspective view of the ho y portion or channel-shaped section of the ring; Fig. 4 is a perspective view of the intermediate section that is arranged between the flanges of the body portion of the ring; Fig. 5 is a cross sectional view of the ring taken on the line 5-5 of Fig. 2; and Fig. 6 is a cross sectional view taken on the line 6-6 of Fig. 2.

Referring to the drawlngs which illustrate the preferred form of my invention, A and designate two split ring shaped expansible members combined in such a manner that each member extends across the joint between the ends of the other member. The member A which I will term the body portion or section of the ring, is channelshape in cross section, and comprises a air of horizontally disposed flanges 1 an 1 that project laterally from a vertically disposed web 2. The member A is ring-shaped and is split at one point, as shown in Fig. 3, so that it can expand and contract, and the end portions of said member are so shaped that they lap over each other. In the preferred form of my invention, as herein shown, the upper half of the web 2 at one end of the member A is notched out and the top flange 1 is cut oil', and the lower half of the web at the opposite end of said "member is notched out and the bottom flange 1 is cut off so as to form a scarf-joint in the member A. By splitting the member A in this manner I obtain a projection 3 at one end of said member that laps over a projection 4 at the opposite end of said member, as shown in Fig. 3, the top flange 1 of the member A extending clear to the end of the projection 3 and the bottom flange 1 of said member extending clear to theend of the projection 4.

"The space or j flanges of the member A is covered by the member B or intermediate-section of the ring. This intermediate section B consists of a split expansion ring of rectangularshape in cross section whose depth corresponds to the vertical distance between the horizontally disposed flanges of themember A and whose width preferably corresponds to the length of said flanges. The member B surrounds the vertical web 2 of the member A and lies snugly between the horizontal flanges of said member, as shown in} Fig. 5, said member B being so arranged that the joint between the ends of same'lies diametrically opposite the joint between the ends of the member A. vThe end portions of the member B are also preferably notched out so as to form a scarfjoint comprising overlapping port1ons,1as shown in Fig. 4. Means is provided for preventing the intermediate section B.from moving circumferentially with relation to the bodv portion A of the ring or from asoint in the vertical web and suming such a position that the joint in the member B lines up with the joint in the member A. The means herein' shown for accomplishing this consists of a pin 5 on the member A that projects outwardly from the vertical web of said member, as shown in Figs. 2 and 6, so as to form a stop against which one end of the intermediate section B bears, the end of the member B being provided with a notch or recess 6, as shown in Fig. 4, for receiving said pin.

The ring, composed of the two expansible members A and B, is arranged in the usual manner in a horizontally disposed groove formed in the outer surtace of a iston C, as shown in Fig. 1, and in view 0 the fact that said ring is continuous and has an extended bearing surface on the side wall of the cylinder D, it is leak-proof and consequently overcomes the necessity of equipping the piston with three or four packing rings as is now the universal practice in internal combustion engine construction, thereby effecting a great saving in the cost of manufacturing such engines. The rin can expand and contract without permitting the pressure in the cylinder to escape for the intermediate section B of the ring extends across all portions of the joint between the ends of the member A; nor it is possible for the pressure to leak through the joint in the intermediate member B owing to the fact that the end ortions of said member are overlapped H the groove in the piston which receives the ring becomes worn to such an extent that the ring can move longitudinally of the piston, the efficiency of the ring is not impaired because it is impossible for the two sections of the ring to separate vertically. Moreover, long usage and the resultant excessive wear will not effect the ring in view of the fact that the two sections or parts of same can expand or open up quite a distance without causinv the overapping end portions of the mem r A and the member B to become disengaged.

From the foregoing it will be seen that I have produced a piston packing ring which is so eflicient that only one ring has to be used on a piston.

The ring can be manufactured cheaply, it can be applied and removed easily, excessive wear does not impair the efficiency of same, and it is so designed thatthe two parts of same cannot separate vertically in case the groove in which the ring is mounted is large enough to permit the ring to move longitudinally of the piston.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A packin ring comprising a one-piece expansible bo y portion, split at'one point and provided with overlapping end portions, said body portion being provided in its outer surface with a groove, a split expansion ring in said groove having overlapping end portions, and means for preventing said expansion ring from assuming such a position with relation to sald body portion that the joints between the ends of said parts aline.

2. A packing rin comprising a one-piece ring-shaped expansi le body portion split at one point by a scarf-joint, said body portion being substantially channel-shape in cross section and arranged with its horizontal side legs or flanges projecting outwardly, a split expansion ring arranged between the horizontally-disposed flanges of said body portion and having overlapping end portions, and means for preventing said ringfrom moving .circumferentially with relation to said body portion.

3. A packin ring comprising a one-piece expansible bo y portion, split at one point, said bod -portion being provided in its outer sur ace with a groove, and a split expansion ring in said groove.

In testimonywhereof I hereunto aflix my signature in the presence of twowitnesses, this twenty third day of -Ma 1913.

FRANK VAN DER RUYSSEN.

Witnesses:

WELLS L. CHURCH, GEORGE BAKEWELL. 

